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Production process of abrasive block with ultra-low porosity and high density

A production process and porosity technology, which is applied in the field of ultra-low porosity and high densification grinding sub production process, can solve problems such as hot cracks and metal inlays, and achieve the effects of improved wear resistance, reduced porosity and tight bonding.

Active Publication Date: 2019-02-22
马鞍山市雷狮轨道交通装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of metal mosaic and thermal cracks easily occurring during the use of existing abrasives, the present invention provides a production process of ultra-low porosity and high densification abrasives, which improves the wear resistance of abrasives and prolongs the service life; at the same time , by optimizing the composition ratio and processing technology, reduce the porosity of the abrasive, make it more dense, and avoid thermal cracks during the use of the abrasive

Method used

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  • Production process of abrasive block with ultra-low porosity and high density
  • Production process of abrasive block with ultra-low porosity and high density
  • Production process of abrasive block with ultra-low porosity and high density

Examples

Experimental program
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Effect test

Embodiment 1

[0032] This embodiment provides a production process for ultra-low porosity and high-densification abrasives, which specifically includes the following steps:

[0033] (1) Batching: according to the following formula, the specific parameters are shown in Table 3, including the following components and parts by weight: 60 parts of iron powder, 8 parts of silicon carbide powder, 12 parts of steel fiber, 10 parts of lignin coupling agent, 10 parts of resin powder;

[0034] (2) Put the batch material into the vacuum mixer, pre-homogenize for 200 seconds, and then start granulation 15 seconds after adding the coupling agent. After 450 seconds of granulation, start vacuum granulation for 250 seconds. Mixture;

[0035] (3) Put the mixture into a vacuum hot press, put it into the matching steel back for vacuum pressing, the specific pressing process is: set the vacuum degree to 0.2MPa, after setting according to the pressing curve in Table 2, click Press the start button. Set the c...

Embodiment 2

[0042] This embodiment provides a production process for ultra-low porosity and high-densification abrasives, which specifically includes the following steps:

[0043] (1) Batching: according to the following formula, the specific parameters are shown in Table 3, including the following components and parts by weight: 55 parts of iron powder, 6 parts of silicon carbide powder, 13 parts of steel fiber, 9 parts of lignin coupling agent, 5 parts resin powder;

[0044] (2) Put the batch material into the vacuum mixer, pre-homogenize for 300 seconds, then put in the coupling agent for 20 seconds, start granulation, after 500 seconds of granulation, start vacuum granulation for 200 seconds. Mixture;

[0045] (3) Put the mixture into a vacuum hot press, put it into the supporting steel back for vacuum pressing, the specific pressing process is: set the vacuum degree to 0.1MPa, after setting according to the pressing curve in Table 3, click Press the start button. Set the compression...

Embodiment 3

[0052] This embodiment provides a production process for ultra-low porosity and high-densification abrasives, which specifically includes the following steps:

[0053] (1) Batching: according to the following formula, the specific parameters are shown in Table 3, including the following components and parts by weight: 50 parts of iron powder, 7 parts of silicon carbide powder, 15 parts of steel fiber, 8 parts of lignin coupling agent, 10 parts of resin powder;

[0054] (2) Put the batch material into the vacuum mixer, pre-homogenize for 100 seconds, and then start granulation 10 seconds after adding the coupling agent. After 300 seconds of granulation, start vacuum granulation for 200 seconds. Mixture;

[0055] (3) Put the mixture into a vacuum hot press, put it into the supporting steel back for vacuum pressing, the specific pressing process is: set the vacuum degree to 0.3MPa, after setting according to the pressing curve in Table 4, click Press the start button. Set the ...

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Abstract

The invention discloses a production process of an abrasive block with ultra-low porosity and high density, and belongs to the field of rail transportation equipment. The components and parts by weight are as follows: 50-65 parts of iron powder, 5-8 parts of silicon carbide powder, 10-15 parts of steel fiber, 5-10 parts of a coupling agent, and 5-10 parts of resin powder. The main process flow comprises: vacuum granulation, vacuum hot press formation, and gas furnace solidification. The above optimized process can reduce the porosity of the abrasive block and densify the product, and at the same time, because the whole process does not need exhaust treatment, the combination of the mixed materials and the steel back is tighter, and a high-quality abrasive block with good appearance can beobtained, and does not produce metal damascene and hot cracking during use. The wear resistance of the abrasive block can be improved.

Description

technical field [0001] The invention belongs to the field of rail transit equipment, and more specifically relates to a production process of ultra-low porosity and high-densification abrasives. Background technique [0002] The tread cleaner plays the role of cleaning the wheel and increasing the wheel-rail adhesion coefficient to ensure the safety of the service brake. The part of the tread cleaner that directly acts on the wheel is called a grinder. The grinder is a friction part in the tread cleaner that has the functions of cleaning, thickening, and rounding. In view of the above functions, the grinder plays an important role in driving safety. During the production process of the grinder, generally The production process of hot-pressing after mixing with a plow-type mixer, and then curing, however, the grinding wheel produced by this traditional production process has a high porosity and a loose structure, which is easy to use during its use. The occurrence of metal i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/00C04B41/62C04B40/02
CPCC04B26/00C04B41/009C04B41/46C04B41/62C04B2201/20C04B2201/10C04B2201/50C04B2111/00362C04B14/34C04B14/324C04B14/48C04B18/26C04B40/0259C04B40/0263C04B40/0272C04B41/4543
Inventor 贺子铭彭程林
Owner 马鞍山市雷狮轨道交通装备有限公司
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